Machine for



A. BOECLER.

MACHINE FOR APPLYING SOLUTIONS OF RUBBER OR THE LIKE T0',FABR|CS..

APPLICATION FILED SEPT. 13, 1920.

ma ma,- ented uly 18,, 1922.

2 SHEETSSHEET I.

a zlmw A. BOECLER.

MACHINE FOR APPLYING SOLUTIONS OF RUBBER OR THE LIKE TO FABRICS.APPLICATION man SEPT. 13, 1920.

jLAQgfiQg; Patenm July 18, 1922.,

2 SHEETSSHEET 2.

s'raras ea -rear orrrcce.

. ALBERT BOECLER, F MALMO, SWEDENJASSIGNOR T0 FENZINE INC., ACORPORATION OF NEW YORK.

CONDENSATION MACHmE FOR APPLYING SOLUTIONS OF RUBBER. ,OR THE LIKE TOFABRICS.

Specification or Letters Patent. P r t Jufly 1s, 1 2

Application filed September 13, 1920. eria1'lfo.409,969.

T '0 all whom it may concern Be'it known that I, ALBERT BoEcLER, asubject. of the German Republic, residing at Malmo, Sweden, haveinvented certain new and useful Improvements in Machines for ApplyingSolutions of Rubber or the like to Fabrics (for which I have filed anapplication in Germany, Apr. 14:, 1914) of which the following is aspecification.

This invention relates to machines for applying solutions of rubber orsimilar material to fabric webs, or to impregnate such webs withsolutions of rubber or similar material. In machines of this kind it isof importance to recover the solvents of such rubber, particularlybenzine. The working table of such machines is enclosed in a casing,

which in its lowerpart is constructed as a cooling mantle, or providedwith cooling serpentines.

Such devices have proved to work well once the apparatus has started towork. However, such starting has been found to be difficult.- This eventcan be explained bythe fact that as soon as an interruption of theworking takes place, the drying or working table is cooled and,therefore, the casing will be filled with cold vapours of the solvent.Such vapours have throughout the same specific gravity, and since onstarting the apparatus the newly evaporated benzine will be warmer and,therefore, have a lessflspecific gravity, these vapours will not be in aposition to crowd away the cooler and therefore heavier vapoursaccumulated below, and therefore cannot reach the cooling device. Thesame v drawback will take place, though not to the same extent, when thelower part of the easing is filled with air. 1

To a certain degree the drawbacks mentioned above could be avoided byopening doors at the lower part of the casing when the machine isstarted to Work. This, however. will have the disadvantage that thevapours will emerge into the atmosphere.

According to the present invention the drawbacks mentioned above, willbe avoided by giving opposite parts of the casing differenttemperatures. This will cause a circulation within the casing which willautomatically set in as soon as the heating surface becomes warm,without necessitating the action of mechanical means, such asventilators or the like. The downward flow of the benzine vapours nowwill only take place on one .side of the side of the working table,while on the other I table the vapours will flow upwards.

In the drawing, in which is shown by way of example a machine for theabove stated purpose, Figure l is an elevation of the machlneconstructed according to the invention. F igure'2 is a cross section andFigure 3 a plan of the machine. Figure 4 is an elevation of amodification partly in section, and Figure 5 a section of .themodification shown in Fig. 4.; Y

The casing enclosing the working table a consists of a lower providedwith doors or flaps h and windows 70. An outlet. d is point of thecasing for allowing condensed benzine to escape from the casing. Thepart c of thecasing now comprises either a single chamberas shown inFig. 2, or several chambers as shown in Fig. 5. In the first instanceonly on one side an outlet f need be provided for the cooling waterenteringat e. If, however, it is preferred to arrange also on, the otherside an outlet f, there will be a difference in the cross sections ofthe two outlets so that the cooling water will flow through one withless velocity than through the other. The consequence of this is that onthe part of the casing between f and e, if outlet f has the greatercross section there will be, a greater coolin effect than between 6 andf. In the examp e shown in Fig. 2 the circulation will take place in ananti-clockwise direction, because the vapours that arise above the tablea will at once flow to the left hand cooling surface projecting abovethe table and will hereby be cooled, and as far as these vapours are notcondensed they will flow along the surface downwards. When they reachthe lowest point, they will by that time be heated to a certain extent,andtherefore the uncondensed vapours will flow upwards on the righthand. side, and thus enter again the space above the working table a.

The condensation is so violent that. there is a possibilit to restrictthe cooling of the lower part 0 the casingto the extent of a fractionofthe length of the table.-

It may be found preferable "to make that part of the casing which is tobe cooled in three sections, by which it will be possible to extend thelateral walls to the ceiling or cover of the casing. This modificationis shown in Figures 4 and 5. The front part part c and an upper part.

provided at the lowest arise from the impregnated 'web g will be cooledabove the table h .on the side walls so that they will quickly run downalong the latter; Hereby the-circulation Will be essentially, improved.Owing to the fact that the casing is made in three sections, it will bemuch easier to erect the casin on the machine. :The lateral walls 6 andc are constructed independently from the bottom d hollow or double, andthe connection of the bottom with the side walls is carried out by pipesz'. The inlet pipe 70 of the cooling liquid is arranged only on one sideso that the wall 0 will be cooler than the Wall 6, thus arranging sothat the two longitudinal side walls of the casing will have differenttemperatures. The rubber' solution, as is usual in machines of thisdescription, is filledinto the funnel a below which the fabric g isdrawn along in the casing, as is well known in machines of thisdescription. After traveling over the table a or k horizontally; itpasses around-the roll 9' and then is drawn again horizontally below thetable a or k and leaves the casingat 9 where it is guided by the roll 9and is finally reeled up by the roll g, which is rotated by the usualdriving mechanism.

The roller-g is journaled 'within a prolongation of the casing Z), whichpro-. longation isvprovided with coolingjackets d similar to thoseprovided in the casing b.

I claim:

1. A machine for applying to fabric webs vor impregnating fabric Webswith solutions of rubber or similar material, comprising a working tableand a casing, provided with cooling means on its lower part, the coolingmeans being soconstructed and arranged that the rate of flow of thecooling medium through different portions of the casing will not beuniform whereby the lateral walls of the casing will be cooled atdifferent temperatures. a

2. A machine for applying to fabric webs or impregnating fabric webswith solutions of rubber or similar material, comprising a working tableand a casing, provided with cooling means on its lower part, the coolingthrough different portions of the casing will not be uniform whereby thelateral walls of the casing will be "cooled at different temperatures,the cooling walls being made hollow or double.

3. A machine for applying to fabric webs or impregnating fabric Webswith solutions of rubber or similar material, comprising a. workingtable and a casing, provided with cooling means on its lower part, thecooling'means being so constructed and arranged that the rate of flowofthe cooling medium through different portions of the casing will not beuniform whereby the lateral walls of the casing will be cooled atdifferent temperatures, the cooling part of the casing constructed inthree sections, two of these for-mingthe lateral walls and one thebottom, each of which being constructed hollow or double independentfrom one another, and pipes-to connect the lower parts of the side wallswith the hollow space of the bottom, outlets on the upper part of theside walls, and an inlet pipe on the bottom arranged to one side of thecentre line.

4. A machine for applying to fabric webs or impregnating fabric webswith sol-utions' of rubber or similar material, comprising a workingtable'and a casing, provided with cooling means on its lower part, thecooling means being so constructed and arranged that the rate of flow ofthe cooling medium through different portions of the casing will not beuniform whereby the lateral walls of the casing will be' cooled atdifferent temperatures, the cooling part of the'casing constructed, inthree sections, two of these forming the lateral walls and one thebottom, each of which being constructed hollow or double independentfrom 'one another, and pipes to connect-the lower parts of the sidewalls with the hollow space of the bottom, outlets on the upper part ofthe side walls,and an inlet pipe on the bottom arranged to one side ofthe centre line,

the lateral hollow walls extending up to the top of the casing.

ALBERT BOE-CLER.

lVitnesses:

ERNST PERSSON, Faun LANZOW.

